I have two computers (home and work) that I want connect to VPN. Both computers are behind NAT. I have no access to network configuration so configuring VPN server on router is not possible. Is there free service or software that know's how to do that? I use Windows at work and Mac at home.
I know that Hamachi could do that but its quite expensive.
Thank you for your help.
The free version of logmein hamachi is not centrally managed, but the price is right
https://secure.logmein.com/products/hamachi/download.aspx
Also, the paid version is only $29 per year: https://secure.logmein.com/products/hamachi/purchase.aspx
Review here : http://www.pcworld.com/article/258926/logmein_hamachi_gives_small_businesses_most_of_the_vpn_they_need_for_free.html
If you can get a VPN server that uses UDP, for example OpenVPN, you can use UDP hole punching to get through any NAT firewalls to create a connection between the two machines. Have a look at pwnat for an implementation of it, however it only runs on Linux or via Cygwin, so you may need to create your own implementation.
While not technically a VPN, TeamViewer is an option (free for personal use): http://www.teamviewer.com also http://crossloop.com both are very easy to setup and have excellent performance. I use Amahi's implementation of OpenVPN which is very easy to setup (also free). I have it running on a very skinny virtual machine: http://www.amahi.org/how-it-works it can also run on a Plug computer...
